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Perhaps DirecTV is finally getting the word on the slow Guide....
Found this post by Dan Collins over as DBSForums:"Interestingly, speeding up the DirecTV-style grid seems to be a priority for DirecTV. I've been invited to answer a couple of user surveys conducted both by TiVo and DirecTV and both had several questions regarding the speed of the grid guide. Hopefully, this will translate into different data queries being written that are better suited to building the grid."

He also posted the following information regarding how the Guide works:
"The guide problem is a software issue.

The TiVo-style guide displays the current program for 10 channels (which is stored in memory all the time), and the next 10 programs for one channel at a time (which is retrieved from disk on demand). Each time you scroll up or down a channel, a new query is executed against the database to collect the schedule for that channel.

When you use the DirecTV-style guide, the software STILL queries the database for the next 10 programs on the first channel displayed. It then discards most of the returned data, since it only needs 1.5 hours worth. This query is then executed for EACH channel in the guide - 8 distinct queries. This is repeated EVERY time the grid is refreshed.

An alternative indexing system and a rewrite of the queries used would greatly improve the performance of the DirecTV grid-style guide.